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package UDPDemo;import java.net.InetSocketAddress;import java.nio.ByteBuffer;import java.nio.channels.SelectionKey;import java.nio.channels.Selector;import java.nio.channels.ServerSocketChannel;import java.nio.channels.SocketChannel;import java.util.Date;import java.util.Iterator;import java.util.Set;public class DateServer {	/**	 * @param args	 */	public static void main(String[] args) throws Exception{		//表示5个监听端口		int []ports = new int[]{8001,8002,8003,8004,8005,8006};		//通过open方法找到selector		Selector selector = Selector.open();		for(int i=0;i
   
    0){			//取出全部的键			Set
    
      selectionKeys = selector.selectedKeys() ;			Iterator
     
       iterator = selectionKeys.iterator();			while(iterator.hasNext()){				SelectionKey key = iterator.next();				if(key.isAcceptable()){					//					ServerSocketChannel server = (ServerSocketChannel) key.channel();//取得对应的服务器通道					//获取客户端					SocketChannel client =  server.accept(); 					//设置非阻塞					client.configureBlocking(false);					ByteBuffer  bf = ByteBuffer.allocate(1024);					bf.put(("当前时间为:"+new Date()).getBytes());					bf.flip();					client.write(bf);					client.close();				}			}			selectionKeys.clear();					}	}}
     
    
   

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